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how to distinguish between ketones and aldehyde? pls tell as soon as possible

how to distinguish between ketones and aldehyde?
pls tell as soon as possible
 

Grade:12th pass

1 Answers

MRIDUL TRIPATHI
39 Points
5 years ago
u can do that by following ways-

o For the Schiff’s test, aldehydes show a pink color while ketones don’t have any color at all.

o In Fehling’s test, there’s an occurrence of a reddish precipitate while in ketones there’s none.

 

o For Tollen’s test, a black precipitate is formed while in ketones there’s again none.

With the sodium hydroxide test, aldehydes show a brownish resinous material (except for formaldehyde) while ketones don’t have any reaction to such.

o For the reagent sodium nitroprusside plus some drops of sodium hydroxide, aldehydes emit a deep reddish color while ketones exhibit a reddish color which later transforms to orange.

 

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